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Is the star formation rate in quasars overestimated?
Fabio Di Mascia, Stefano Carniani, Simona Gallerani +4
The large total infrared (TIR) luminosities () observed in quasars are generally converted into high star formation rates ($SFR \gtr…
Does the lockstep growth between black holes and bulges create their mass relation?
Guang Yang, W. N. Brandt, David M. Alexander +7
Recent studies have revealed a strong relation between sample-averaged black-hole (BH) accretion rate (BHAR) and star formation rate (SFR) among bulge-dominated galaxies, i.e., "lo…
NuSTAR observations of a heavily X-ray obscured AGN in the dwarf galaxy J144013+024744
Shrey. Ansh, Chien-Ting J. Chen, W. N. Brandt +10
We present a multi-wavelength analysis of the dwarf Seyfert-2 galaxy J, a candidate obscured active galactic nucleus (AGN) thought to be powered by an intermediate-m…
Cosmic radiation backgrounds from primordial black holes
Francesco Ziparo, Simona Gallerani, Andrea Ferrara +1
Recent measurements of the cosmic X-ray and radio backgrounds (CXB/CRB, respectively) obtained with Chandra and ARCADE2 report signals in excess of those expected from known source…
Supermassive Black Holes at High Redshift are Expected to be Obscured by their Massive Host Galaxies' Inter Stellar Medium
R. Gilli, C. Norman, F. Calura +12
We combine results from deep ALMA observations of massive () galaxies at different redshifts to show that the column density of their inter stellar medium (…
Spectral Energy Distributions in Three Deep-Drilling Fields of the Vera C. Rubin Observatory Legacy Survey of Space and Time: Source Classification and Galaxy Properties
Fan Zou, W. N. Brandt, Chien-Ting Chen +9
W-CDF-S, ELAIS-S1, and XMM-LSS will be three Deep-Drilling Fields (DDFs) of the Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST), but their extensive multi-waveleng…
An X-ray fading, UV brightening QSO at
Fabio Vito, Marco Mignoli, Roberto Gilli +13
Explaining the existence of SMBHs at is a persistent challenge to modern astrophysics. Multi-wavelength observations of QSOs revea…
The Dawn of Black Holes
Elisabeta Lusso, Rosa Valiante, Fabio Vito
In the last decades, luminous accreting super-massive black holes have been discovered within the first Gyr after the Big Bang, but their origin is still an unsolved mystery. We di…
Feedback effect on the observable properties of AGN
Fabio Vito, Fabio Di Mascia, Simona Gallerani +4
Active galactic nuclei (AGN) feedback has a major impact onto the supermassive black-hole (SMBH) growth, the properties of the host galaxies, and their cosmic evolution. We investi…
Enhanced star formation in quasar companions
Tommaso Zana, Simona Gallerani, Stefano Carniani +5
Quasars powered by supermassive black holes (MBH, ) at are predicted to reside in cosmic over-dense regions. However, observations so far could not confi…
Sensitive Chandra coverage of a representative sample of weak-line quasars: revealing the full range of X-ray properties
Q. Ni, W. N. Brandt, B. Luo +8
We present deeper Chandra observations for weak-line quasars (WLQs) in a representative sample that previously had limited X-ray constraints, and perform X-ray photometric analyses…